Overseaming sewing-machine.



C. F. GRA.

nvmmmmme Smm@ Mmmm.

APPL-VGATXON FILED JUNE 11, 1909, 190562,35@a Patent-ed Jan. 14, 1913.

2 SHEETSASHEET 1.

INI/ENTUH ATTORNE Y C. F. GRAY.

OVERSBAMING SEWING MACHINE.

APPLICATION FILED JUNE l1, 1909;

Patented Jan. 14, 1913.

2 SHEETS--SHEET 2.

VVE/WOR@ A7 ORA/EY WITNESSES:

@istria-p sTATEsPA-TENT: oFFrCE;

CHARLES FREDERICK GRAY, or' SIERRA MADRE, CALIFORNA, Assrert'on '.r'osmerig MANUFACTURING CQMPANSL A .CORPORATION oF -NEW 'JERSEY'.

f OVERSEAMING sEWmGfMACHINE.

Specification o fLetters Patent.

i To all winmmy concern.'

Y ticularlito machines for' producing a con-- tinuous seam composed ofsections. of.

it, known that I, CHARLES F. GRAY, a

citizen' of t-lie `United States. residing at- Sierra- Madre, in thecounty of Los Angeles and State of California', have inventedg'cer# tainnew and useful Improvements in Overseaming Sewing-.alachinea of' vwhichthe following'is a specification, reference being had therein .to theaccompanyingdrawings.

This invent-ion'- relates to animprovement in= overseaiiiingr sewingmachines. and parstraight-awaav and zigzag stitching, such as -iscommonlyA employed ii'i closing shoe nppers, stitching:T patcli'pockets"to garments andl performing 'various operations upon overalls andcertain other articles of'clotliing.

In'seams consisting'of combined straightaivay fand zigzag portions. itisdesirable to vary the degree ot tightness of the stitches to'ena'bletheliiaterial at. the more loosely stitched zigzag portion. to be openedout fiat. The object of the` present. invention is to facilitate thisand also to facilitate the making 'of a., zigzag seam composed `o i'stitches of different degrees of. tightness where desired atdieientparts.

The" invention consists essentially in a stitch-finger adapted forvintroduction within the, range of action of the. stitch-forniingmechanism' for receiving andsupporting i the overseain stitches, 'andmeans operable While -the machine., is in motion for throwing'saidstiteh-tingei'- into or out of such operativeposition: :ind it includes.more ging .needle; and it is shown in tliegaccom- 'panying drawingsapplied to Aa Singer No.

1 07-W-2- machine forming the subject off" my Patent No. 933,032, dated-Augiist` 31,

' `While the vpresent invention-is not' directed specifically to generalconstructive features of- ,the machine as regards the niechanism" forproducing and changing the character of the stitches, itis in thepresent embodiment so related to this mechanism that a'des'cription andillust-ration ofthe entire machine Awill befound useful in setting forththe present improvement.

I n the accompanying drawings, Figure 1 is a front side elevationof amachine embodying the present improvements, .and Fig. 2 a sectionalplanfview of the same taken partly through the axis of the mainsliaftand partly through that of thecamshaft and controllin?,` rock-shaft Fig.3 is a detail elevation of the needlejogging devices. Fig. t is a rearside 'eleva-tion of the4 ratented;mn.14, iaieg machine and Fifi'. 5 asimilar elevation` showing,r the 'jog-control]ingineclianism in adifferentposition.` Fig. (i is a plan of the elbow-lever cariving thestitch-fingerwith eertain of the. coi'iiwratinigparts of the ma.-cliine. Fig. 7 lis ali-elevation of t-lielower portion of thecani-rodaud the-.cam for controlling` t-lie position of thestitelrlingcr.

Fig. S is aperspective view of the presser# foot. with a portion of the`same' broken out tocxpose the. .stitchdingein which is reprevsented inoperative relation t-l'iei'ewith.

',lhe. machine is constructed with the usual bed-plate l withoverhangiing'bracket-arm l upon the head 3 of which is disposedthchorizontal firlcrum-stud -.l-. upon which is joiirnalcd `thesivingilng1r needlc-har frame provided lin its lower portion 'with atransverse slot. t' to rcceivetjlie headed 'fnid'e-st-nd 'T' olion 'the'lower member of the head- 3 of the ln'm'kct-arin.

Y lln the lateral hearing members 8- of the needic-har trame Ii is'Ajonrnaled'.the vertically reciprocating needle-bar 9 Cari-ying the.needle l0 and provided with the i.\'cd collar 'll carrying:r a .sindembraced by one end of the pitman 1. whose opposite. end vembraces avcrank-pin upon the crank-platel 13 ixed upon t-lie forward vend of themain-shaft 14 which is fournaled as usual in the bracketarm and rovidedat its rearward end with the balanc-wheel 15.

The needle coperates with the rotary Alock-stitch hook 16 mounted uponthe transverse shaft 17 connected by suitable gearing with thelongitudinal shaft 18 'mounted 1 cam-shaft 23 which is thus rotated atonehalf the speed of the main-shaft.. The camshaft carries the:so-called triangular cam 24 which is embraced by the parallel mem-]bers 25 of a yoke 26 formed at the forward end of a link-bar 27pivotally connected at,

its rearward end by means of the screw-pin 28 'with a, lug 5* upon theneedle-frame 5.

.As will be observed, the link-bar 27 receives vibratory movements uponits pivotal connection 28 from the actuat-ing canr24, but is free tomove endwise in relationto said cam. In order that the sidewiseactuationimparted by the cam may be partially converted into endwise movement,the linkbar is provided adjacent its yoke 26 with a controlling stud 29which is provided with suitable guiding means for determining its pathof movement. A Y

As herein shown, the guiding means comvprises the swinging link 30, oneend of which embraces the controlling stud 29 of -the link-bar 27 andtheother end embraces a fulcrum-stud 31 carried by lateral arm 32 fixedupon the transverse rock-shaft 33 journaled in the rearward side of thebracket-arm parallel with the cam-shaft 23. The rock-shaft 33 isdisposed slightly below and forwardly of the cam-shaft 23, and in suchposition thatits axis is at. substantially 'the same level, andpreferably coincident with that of the controlling stud. 29 when thelink-bar 27 is in its extreme lower position. A

The vcontrolling rock-shaft 33 has fixed upon its rearward end thelateral crank-arm 34 forked at its'outer end to embrace a pin 35 uponthe forward end of -a lever 36 fulcrumedy upon the fixed stud 37' uponthe bracket-arm and formed in its .lower sideA with a socket 38 enteredby the upper threaded end of' a push-rod 39 provided Y with a thrust-nut40 between which and the guiding boss' 41 of the bracket-arm isinterposed a spring 42 by meansof which the arm 36, and consequently thearm 34, is yieldingly maintained in raised position. The crank-arm 34 isprovided with a lug 43 having an eye in which is hooked the upper end ofthe treadle-rod 44, adapted for drawingsuch arm downwardly to rock theshaft 33 in opposition to the spring 42. When the arm 34 is in.itsnormal or upper position, as represented in Fig. 4, the fulcrunr stud 31for the swinging link 30 is disposed upon an imaginary line joiningftliecenters of the shaft 23 and pivotal screw-pin 28, so that the vibrationofthe link-bar 27 carries the controllingI stud 29 across such lineatsubsta-ntially right angles, and hence it receives no endwise motionthrough the Iguiding link 30; but when the arm 34 is drawn downwardlyinto the position represented in Fig. 5, the rocking of the shaft 33carries the fulcrum-stud 31 above such imaginary line, whereby t-he link30 is caused to swing ,across said line obliquely, thus producing anendwise movement of the link-bar 27 in addition to its uniform sidewisemovement, this endwise Amovementbe -a diametrical groove or recess withabrupt side walls to form stop-shoulders' 46 and with laterally andAoutwardly inclined 'ends 47 convergent with the beveled edge portions 48ofthe cam-disk whose outer periphery is otherwise cylindrical so asto'atford externally of said recess segmental stop-- shoulderscircularly coextensive with the.

shoulders A46. The lever arm 34 carries upon its front face a stud 49which, in the normal elevated position of the arm 34 represented in Fig.4, is disposed substantially concentric with the vcam-disk 45, andextends with` -in the transverse groove or recess therein.l

The cam-disk 45 is so setupon the shaft23 in relation to the actuatingcam 24 that when the yoke 26 first reaches the limit' of its extremeupper 4or lower throw, anid the needle y is rising and its point is alittle above the work, the cam-groove is substantiallyyertical so as topermit the descent of the locking stud 49 from normal concentricposition with the crank-'arm 34; but as the cam-shaft continues torotate and the needle rises to its highest posit-ion, the vcam-groove isbrought into varying angular relations with the circular path ofmovement of the stud 49 upon the .crank-arm34 and serves to restrain themovement of the latter by one of its segmental stop-shoulders 46 until`the cam-disk has made substantially a semi-rotation-'and the transversecam-groove again assumes a substantially1 vertical position as the yoke26 attains its opposite extreme position,and thel point of thevneedle isagain above the work and rising to extreme elevated position, when thestud 49 isagain free to move downwardly with its supporting arm 34 inshifting thev fuIcrum-stud 31' rio effecting the, change between straihttiiive y and zigzag stitching conditions. l len ilie.yielding'cam-disk 45 is` in releasing posit-loir as indicated in Fig.4', the drawing down of they lever-arm 34 causes the stud @din itsdescent to engage the inclined end portion 47 of the cam-groove, therebycausing the thrusting aside of theyielding camdisk, but the continueddescent of the stud past the transverse cam-rib afforded by the/convergently beveled cam-portions 47 and.

48 permits the cam to return under the action of its spring into itsnormal position, the stop-shoulder afforded by the angular edge of thecam-disk locking the stud 49 in its lower position and preventing thereturn of the arm 34 to initial straight-.away stitching position untilthe treadle-rod 44 is released by the operator and one of the externalbevelsr 48 is presented to the stud 49, when the crank-arm 34 rises toinitial straight-away stitching position under the action of the spring42. j

Upon` the bedlate of the machine. be'- neath the bracket-arm ispivotally mounted by means of the fulcrum-screw 50, a twoarmedbell-crank or elbow-lever havinga. shorter lateral arm 51 carrying alateral stud 52, and a longer longitudinally extending arm 53 upon t ebottom of the forward extremity of which is secured by means oi" thefastening screw 54 the shank 55 of a stitch-receivin linger 56 normallydisposed slightly ina vance of the center -of the transverse needle-slot57 of thefthroat-plate 58, but adapted to assume operative relationcrosswise of the needle-slot when its carrying lever 51 53 is shifted.The leverarm 51 is normally ymaintained in its for- Ward position,thatof inaction of the stitchfinger 56, by means of a sprin 59 interosedbetween the same and the ase of the racket-arm 2, with the end of thestud 52 in contact with the dependin boss 60 of a double-conicalcam-piece 61 Xed upon the vertical cam-rod 62 whose forked head 63embraces and is secured by means of the piv. otalpin 64 to the rockingarm lVhen the arm 34 is in itsupper or straight-away.

stitching position, the stud 52 rests against the boss 60 of thecam-sleeve, and the stitchfinger 56 is in retracted or inoperativeposition, but when the arm 34 descends. depresses the push-rod, whichcarries with it the conical cam-portion 61 acting upon the stud 52 toshift the lever 51 53 to thro-w the stitch-linger in operative positionacross the needle-slot as indicated in Figs. 5 and 6, whereby thedescent o f the needle alternately upon opposite sides of the sainecauses the production of overseam or jog stitches across it. which aresubsequently drawn off its point by the action of the feed-dog 65 in awell-known manner.

es The upp'erportion of the cam-rod 62 is over the same.

reduced and the lower part adjacent such reduced portion isscrew-threaded to receive the correspondingly threaded cam-member 60 61,which is thus made adjustable thereon to conform with vthe adjustment ofthe needle-jog controlling mechanism fordierent widths of overseam. Ajam-nut 66 -is applied to the threaded portion of the rod 62 to lock thecam-member in the desired p0- sition of adjust-ment. l

Aswillbe seen by referencel more partienlarly -to Fig. 8, thestitch-finger 56 isfof taperform from base to point, whereby theadjustment of its advance position determines its effect u on thestitches formed n 'conjunction with the previously described adjustmentof the cammem'ber 6() 61, a sto -plate 67 issecured upon the bed-plate 1iy means of the fasten' screws 68, the stop-plate aifordf n shoul er forpositively -arresting the is'.

ward end of the lever-arm 53 'when' acted upon by the cam -member 61.,The Stop-plate has the usual slotted apertures to receive the fasteningscrews 68, which fa'ord the re-' quired adjustment of the same.

The presser-foot vis mounted upon theA usual spring-pressed presser-bar69 and is provided with a shank portion 70 arid al toot-plate, 71channeled in its upper side and pivotally connected with a forward ex-`tension 72 of the shank-portion b v means of a pivotal pin 73. Thefoot-plate is notched at the inner side of its forward portion forclearance for the stitch-finger, and has formed in its lower side inalinement with the latter a groove 74 into which .the operative portionof the stitch-finger 56 projects and between which parts a suitableclearance space is provided to permit the easy release of theoverseaimstitches as the work is fed forwardly beneath the presser-footby the feeding mechanism.

Having thus set forth the nature of the invention` what I claim hereinis 1. In a sewing machine, the combination with overseamingstitch-forming mechanism, of a. stitch-receiving finger adapted formovement. between extreme positions respectively within and out of therange of action of the stitchforming mechanism, spring-actuated meansfor maintainingsaid linger continuoushv in one of said cxtreme positionsin the production of a succession of lstitches. und manually controlledmeans acting in opposition to .said spring for shifting said linger intothe other cxtreme position.

ln a sewing machine. the combination with stitch-forming mechanismincluding a reciprocating nccdle. and a work-support'. ofslack-prmlucing means adapted to engage the iieedlc-llu'e:ul adjacentthe work-support for insuring the production of loose stitches in thework` means for normally retaining the slack-producingymeans out ofoperative sey relation with the stitch-forming mechanism during theproduction of a succession of stitches, and manually controlled meansincluding an element extending below the work-supj'iort forestablishingoperative relation between the slack-producing lneans andthe stitch-'torming mechanism.

3. In a sewing. machine, the combination with the frame comprising awork-supporting member and an over-hanging bracketarm, andstitch-forming mechanism including a reciprccating needle. ofslack-producing;T means adapted to engage the needlethread adjacent thework-supporting member tor insuring the production ot' loose stitches inthe work, said slack-producing mean,-A hcing adapted to be shifted intoand out of operative relation with .the stitchtorming mechanism, andmanually controlled means comprising a ever fulcrumed upon thebracket-arm and operatively connected with the slack-producing means forcontrolling the position ot' the latter relatively to the stitch-formingmechanism. I

t. ln a sewing machine, the combination with stitch-forming mechanismadapted for production of 'straight-away and zigzag stitchin andct'introlling means for changing the action ot the stitch-formingmechanism from one to the otherI kind of stitch production, of astitch-receiving tinger movable into and out of operative positionwithin the range of action fw stitch-forming mechanism and adapted 'i ireceive and support` the zigzag stitches, and means for moving saidstitch-receiving'tinger into and outI of operative position timedcorrespondingly 'with changes of the stitch-forming mechanism to andfrom zigzag-stitch producing condition.

ln a sewing machine, the combination with stitch-forming mechanismcomprising s recipiwrcating and laterally jogging needle and acooperating loop-taker. and actuating means Yfor imparting reciprocatingniovements to said needle and operative movements to .said loop-taker,needle-jogging means. and controlling means wherebyv said needle-joggingmeans may be thrown into and out ot' etiective operation. of astitchreceiving finger adapted for introduction into operative lpositionin the range of lateral movement ot said needle. and means connectedwith the jog-controlling means for shitting said linger into and out ofoperative position.

G. ln a sewing machine, the combination with stitcli-f -r1iiingmechanism comprising a reciprocating` needle, a cooperating looptake.and actuating means for imparting reciprocating movements to said needleand operative movements to said loop-taker, nir-ins tor impartingjogging movements to s t medie, and controlling means whereby ng mea nsmay be thrown into and out of effective operation, of a stitch-receivmgfinger adapted tor introduction between the needle-paths duringneedle-jogging operations, and means connected with the jog-controllingmeans for moving said finger into operative position when the joggingmeans becolne operative.

7. In a sewing machine, the combination with a throat-plate formed witha needle aperture, and stitch-forming mechanism comprising areciprocating needle adapted to enter Said needle aperture in thethroatplate, a cooperating loop-taker, and actuating means for impartingreciprocating movements to said needle and operative movements to saidloop-taker, normally inoperative means for imparting jogging movementsto said needle, and controlling means whereby said jogging means may bethrown into operation, of a taper stitch-receiving finger adapted forintroduction across said needle-aperture in the throatplate between theneedle-paths during needle-jogging operations, and means adjustablyconnected with the jog-controlling means for moving said finger intooperative position when the jogging means become operative.

8. In a sewing machine, the combination with stitch-forming mechanismcomprising a reciprocating needle, a cooperating looptaker, andactuating means for said needle and loop-taker, of a laterally movableneedle-frame, normally inoperative means for imparting jogging movementsto said needle-lframe.` controlling means including a vibrating arm forthrowing said jogging means into operation, a stitch-receiving tingeradapted for introduction between the needle-paths during needle joggingoperations, a carrying lever for said stitch-receiving finger mountedupon a fixed fulcrum, a reciprocating cam-rod operatively connected withsaid vibrating arm of the jogcontrolling means, and a cam member mountedupon said cam-rod and adapted to engage said carrying lever to throw thestitch-receiving finger into operative relation with the stitch-formingmechanism.

9. In a sewing machine, the combination with stitch-forming mechanismcomprising a reciprocating needle, a cooperating looptaker, andactuating means for said needle and loop-taker, of a laterally movableneedle-frame, normalljv inoperative means for imparting joggingmovements to said needle-frame, controlling means including a vibratingarm for throwing said jogging ymea-ns into operation, a stitch-receivingfinger adapted for introduction between the needle-paths duringneedle-jogging oper- .ations, a carrying lever for said stltch-rememberadjustably mounted upon Said faim rod and adapted to engage saidcarrying le ver to throvT the stitch-receiving finger into operativerelation with Vthe stitch-forming mechanism.

104 l'n a sewing machine'i the combination with VStitch-formingmechanism comprising a reciprocating needle, a. cooperating loop*- takerand actuating mea-ns for said needle and loc' *fzkeigof a laterallymovable needn endwise movable link-bar iv L nnocied at one end with theneedle frame5 means -for imparting to said linkbar uniform. swingingmovements 'of which one in each direction is effected` for everycomplete reciprocation of the needle, guiding means to determine thedirection of movementA of said link-bar under the action of its swingingmeans, a controlling rockshaft by which said guiding means are carried,an arm fixed upon said rock-shaft and provided with means for moving it,.a stitch receiving finger adapted 'for ini-rednetion between theneedle-paths during needle jogging operations, a two-armed carryinglever having):` a .fixed ulcrum at the junction of iis arms and inningfixed to one of said arms said stitclireceiving linger, a recipro ealingcani-rod pivotally connected'vto the asin of said roch-slurf@ acam-member iiiied upon said camqod and adapted to enga'ge the second armof said carrying lever, and a spring for maintaining Said lever-armnormally in the path of Inove'nient of said cam-member.

In testimony. whereo1", I haye signed my naine to thi.)` specification,in the presence of two subscribing Wltnesses.

l CHARLES FREDERICK GRAY. XVit'nesses S. H. SPAFFORD, A. S. MEAD.

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